Wyo. Stat. § 15-1-505
The commission may adopt the master plan in parts as the plan progresses or as a whole. Any part of the plan shall correspond generally with one (1) or more of the functional subdivisions of the subject matter thereof. The adoption of the plan or any part, amendment or addition shall be by resolution carried by the affirmative vote of not less than a majority of the commission. The resolution shall refer expressly to the maps, descriptive matter and other matters intended by the commission to form the whole or part of the plan. The action taken shall be recorded on the adopted plan or part thereof over the signature of the secretary of the commission. A copy of the plan or part thereof shall be certified to the governing body.
W.S. 15-1-505